var box=document.getElementById("box");
var con1=document.getElementById("con1");
var con2=document.getElementById("con2");
var s=document.getElementsByTagName("a");
var speed=50;
con2.innerHTML=con1.innerHTML;
function ScrollUp(){
    if( box.scrollTop>=con1.scrollHeight){
        box.scrollTop=0;
    }else
        box.scrollTop++;
}
var i=setInterval("ScrollUp()",speed);
function Stop(){
    clearInterval(i);
}
function Up(){
    i=setInterval("ScrollUp()",speed);
}